EP3227098B1 - Abrasive composition - Google Patents

Abrasive composition Download PDF

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Publication number
EP3227098B1
EP3227098B1 EP15816562.1A EP15816562A EP3227098B1 EP 3227098 B1 EP3227098 B1 EP 3227098B1 EP 15816562 A EP15816562 A EP 15816562A EP 3227098 B1 EP3227098 B1 EP 3227098B1
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Prior art keywords
composition
percent
abrasive
surfactant
weight
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EP15816562.1A
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German (de)
English (en)
French (fr)
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EP3227098A1 (en
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Richard S. Smith
Douglas A. Davis
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3M Innovative Properties Co
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3M Innovative Properties Co
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09G—POLISHING COMPOSITIONS; SKI WAXES
    • C09G1/00—Polishing compositions
    • C09G1/02—Polishing compositions containing abrasives or grinding agents
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K3/00—Materials not provided for elsewhere
    • C09K3/14—Anti-slip materials; Abrasives
    • C09K3/1454—Abrasive powders, suspensions and pastes for polishing
    • C09K3/1463—Aqueous liquid suspensions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C73/00—Repairing of articles made from plastics or substances in a plastic state, e.g. of articles shaped or produced by using techniques covered by this subclass or subclass B29D
    • B29C73/24—Apparatus or accessories not otherwise provided for
    • B29C73/26—Apparatus or accessories not otherwise provided for for mechanical pretreatment
    • B29C2073/262—Apparatus or accessories not otherwise provided for for mechanical pretreatment for polishing, roughening, buffing or sanding the area to be repaired

Definitions

  • compositions useful in abrading a substrate are provided. More particularly, such compositions are suitable for abrading gelcoat substrates such as those found in marine applications.
  • Abrasives are commonly used in industrial and commercial applications to impart a desired surface finish or treatment to a substrate.
  • the breadth of these applications explains the countless structural and chemical varieties of abrasive solutions presently available on the market.
  • abrasive composition is based on a compound made from hard particles suspended in a soft medium such as a liquid, paste, or wax. These compositions can be disposed on a suitable backing, such as a cloth or buffing pad, and then rubbed onto the substrate to remove scratches. The rubbing process can be carried out by hand or assisted with a motorized tool.
  • the liquid, paste, or wax acts as a binding agent that retains the particulate abrasives on the backing and enables the particles to move across and act to polish the substrate.
  • the binding agent can serve both a protective function that seals the surface against air and moisture and an aesthetic filler that makes scratches left behind less noticeable.
  • the marine industry is a specialized area that presents unique challenges to abrasive finishers because of the nature of the substrate.
  • Marine vehicles are typically coated with a gelcoat, which is used to provide a high-quality finish on the exposed surfaces of a reinforced composite material.
  • Gelcoats are often based on epoxy or unsaturated polyester resins specially formulated with thixotropic ingredients for increased viscosity and non-sag properties, and can be pigmented for color. These compositions are highly crosslinked and extremely tough. Over time, gelcoats can oxidize from ultraviolet light exposure, resulting in a chalky appearance. While this oxidation is a surface phenomenon, it can nonetheless be difficult to remove because of the intrinsic toughness of the gelcoat.
  • US 2005/0130428 A1 discloses slurry compositions suitable for use in processes involving the chemical mechanical polishing of a polysilicon layer.
  • compositions containing high levels of nonionic surfactants can yield enhanced cut levels compared with compositions containing lower amounts of surfactant.
  • the problem with using high surfactant levels relates to the surface finish, which tends to degrade with increasing cut rate. This inverse relationship can also apply with respect to chemical modifications. For example, use of polypropylene oxide homopolymer was found to substantially increase cut levels but also produce an inferior surface finish.
  • compositions solve this dilemma by using surfactants comprising block copolymers that contain both propylene oxide and ethylene oxide moieties, in combination with a co-surfactant that enables the composition to form a stable emulsion.
  • Abrasive compositions that derive from these copolymers were capable of providing both high levels of cut rate and a high quality surface finish on gelcoats that is comparable to those of state of the art marine rubbing compounds.
  • the present invention relates to an abrasive composition as defined in claims 1 to 10.
  • the abrasive composition comprises: an organic solvent; a nonionic surfactant comprising a block copolymer of polypropylene oxide and polyethylene oxide; a particulate abrasive; water; and a co-surfactant enabling the abrasive composition to form a stable oil-in-water emulsion in combination with the remaining components of the abrasive composition.
  • the present invention further relates to a method of abrading a substrate using a backing and the foregoing abrasive composition is provided, the method comprising: applying the aforementioned abrasive composition to either the backing or the substrate; placing the backing in frictional contact with the substrate, wherein the composition is at least partially absorbed into the backing and abrades an outermost surface of the substrate.
  • abrasive compositions and methods of using the same that can be advantageously used in industrial and consumer finishing of gelcoat surfaces.
  • the provided abrasive compositions are heterogeneous, and include both solid and liquid components. These include an organic solvent, a nonionic surfactant comprising a block copolymer of polypropylene oxide and polyethylene oxide, a particulate abrasive, water, and a co-surfactant enabling the abrasive composition to form a stable oil-in-water emulsion in combination with the remaining components of the abrasive composition.
  • a nonionic surfactant comprising a block copolymer of polypropylene oxide and polyethylene oxide
  • a particulate abrasive e.g., water
  • co-surfactant e.g., water, water
  • Organic solvents are well-known in the art and, in principle, can be generally included in the abrasive composition to provide workability.
  • a given solvent may be volatile or non-volatile.
  • Particularly preferred organic solvents include aliphatic hydrocarbon solvents. Such solvents may be cycloaliphatic, alcohol ethers, alcohol ether acetates or mixtures thereof. Examples of such solvents include those hydrocarbon solvents available under the trade designations SHELLSOL H, SHELLSOL K, and SHELLSOL AB, all from Shell Chemicals, the Netherlands; the trade designations SOLVESSO 150, EXXSOL D30, EXXSOL D40, EXXSOL D60, and EXXSOL D80 solvents from ExxonMobil Chemical Company, Houston, Texas; ester solvents such as ethyl diglycol, ethyl glycol acetate, butyl glycol, butyl glycol acetate, butyl diglycol, butyl diglycol acetate, and methoxypropylene glycol acetate; and ketone solvents like methyl ethyl ketone (MEK), acetone, methyl isobutyl ket
  • Total solvents are present in an amount of at least 1 percent, typically at least 2 percent, at least 5 percent, at least 10 percent, or at least 20 percent by weight based on the overall weight of the composition.
  • the total solvents are present in an amount of at most 70 percent, in some embodiments at most 65 percent, at most 60 percent, at most 55 percent, or at most 50 percent by weight based on the overall weight of the composition.
  • Surfactants are amphipathic molecules composed of a hydrophilic part and a hydrophobic part that tend to segregate at the interface between fluid phases with different degrees of polarity and hydrogen bonds such as, for example, an oil/water interface or air/water interface. These characteristics make surfactants capable of reducing the surface tension and forming microemulsions, allowing substances that are generally insoluble in water, such as hydrocarbons, to be more easily dispersed in water. These characteristics give surfactants properties suitable for use as wetting agents, detergents, emulsifiers, foaming agents and dispersants.
  • the nonionic surfactant is a block copolymer containing respective polymeric blocks of polypropylene oxide and polyethylene oxide, wherein the polypropylene oxide block represents at least 60 percent based on the overall weight of the triblock copolymer, and wherein the block copolymer is present in an amount of 0.1 to 10 percent by weight relative to the overall weight of the abrasive composition.
  • the block copolymer can have an overall polypropylene oxide:polyethylene oxide ratio of at least 60:40, at least 80:20, or at least 90:10 by weight.
  • the block copolymer has an overall polypropylene oxide:polyethylene oxide ratio of at most 99:1 by weight.
  • the polypropylene oxide component of the block copolymer has a number average molecular weight of at least 400 g/mol, 500 g/mol, 700 g/mol, 800 g/mol, or 1,000 g/mol. In some embodiments, the polypropylene oxide component of the block copolymer has a number average molecular weight of at most 20,000 g/mol, at most 15,000 g/mol, at most 10,000 g/mol, at most 5,000 g/mol, or at most 2,000 g/mol.
  • Block copolymers having ratios rich in propylene oxide yielded surprisingly high cut rates. Further, those block copolymers containing ethylene oxide endcaps also yielded surprisingly low haze and high gloss values.
  • the nonionic surfactants have an ABA triblock copolymer architecture represented by polyethylene oxide- block -polypropylene oxide- block -polyethylene oxide, where the polypropylene oxide block represents at least 60 percent, at least 80 percent, or at least 90 percent by weight, based on the overall weight of the triblock copolymer.
  • nonionic surfactants based on the block copolymer include terminal hydroxyl groups.
  • the nonionic surfactant has a hydrophilic-lipophilic balance ranging from 1 to 7.
  • the hydrophilic-lipophilic balance is determined using Griffin's method along with generally accepted assumptions regarding identification of hydrophilic and lipophilic portions of a given surfactant molecule.
  • the block copolymer is present in an amount of at least 0.1 percent, at least 0.3 percent, or at least 0.5 percent, relative to the overall weight of the abrasive composition. In these compositions, the block copolymer is present in an amount of at most 10 percent, at most 5 percent, or at most 2 percent, relative to the overall weight of the abrasive composition.
  • the co-surfactant and water advantageously enable the abrasive composition to form a stable oil-in-water emulsion when used in combination with the remaining components of the abrasive composition.
  • Certain co-surfactants were also found, surprisingly, to significantly improve haze and gloss, as measured after using the abrasive composition on gelcoat surfaces.
  • Suitable co-surfactants include sodium dodecyl sulfate, dioctylsulfosuccinate, nonionic ethylene oxide/propylene oxide copolymers, PLURONIC F-68 (also known as PF-68 or POLOXAMER 188), cetyltrimethylammonium bromide (CTAB), PLURONIC F-127 (also known as PF-127 or POLOXAMER 407), TWEEN 80 (or T-80, a polyethylene sorbitol ester), sodium alginate, TWEEN 20, lecithin, sodium lauryl sulfate, monooleate, monolaurate, monostearate, stearyl alcohol, cetostearyl alcohol, tyloxapol, polyethoxylated castor oils such as CREMOPHOR and mixtures thereof (all available from Sigma-Aldrich, St. Louis, Missouri).
  • the surfactants used in the nanosuspensions are preferably nonionic surfactants
  • the co-surfactant has a hydrophilic-lipophilic balance of at least 10, at least 11, or at least 12. On the upper end, the co-surfactant has a hydrophilic-lipophilic balance of at most 18, at most 19, or at most 20.
  • a particularly preferred co-surfactant is polyethylene sorbitol ester, which is derived from polyethoxylated sorbitan and oleic acid.
  • the hydrophilic groups in this compound are polyethers, also referred to as polyoxyethylene groups, and include polymers of ethylene oxide.
  • the abrasive composition incorporates a sufficient amount of co-surfactant to preserve stability of the oil-in-water emulsion despite containing significant amounts of a non-ionic surfactant with a relatively lower hydrophilic-lipophilic balance.
  • the co-surfactant is present in an amount of at least 0.1 percent, at least 2 percent, or at least 3 percent by weight, relative to the overall weight of the composition.
  • the co-surfactant is present in an amount of at most 25 percent, at most 15 percent, or at most 7 percent by weight relative to the overall weight of the composition.
  • the quantity of water is an important parameter affecting emulsion stability.
  • Water is present in an amount of at least 20 percent, at least 25 percent, at least 30 percent, at least 35 percent, or at least 40 percent, based on the overall weight of the composition. Water was present in an amount of at most 90 percent, at most 80 percent, at most 75 percent, at most 65 percent, or at most 60 percent, based on the overall weight of the composition.
  • Lubricants that may be used in the provided abrasive compositions include substantially silicone-free materials that aid the abrasive composition in its handling properties and help the buffing pad slide smoothly across the workpiece.
  • suitable lubricants include oils (e.g., mineral, pine, and paraffinic oils), oleic acid, glycerol, polypropylene glycols, polybutylene glycols, and combinations thereof.
  • the lubricant can be present in amounts of at least 0.1 percent, at least 0.5 percent, at least 1 percent, at least 2 percent, or at least 3 percent by weight, based on the overall weight of the composition. On the upper end, the lubricant can be present in amounts of at most 15 percent, at most 12 percent, at most 10 percent, at most 8 percent, or at most 6 percent by weight, based on the overall weight of the composition.
  • thickeners also referred to as thickening agents
  • thickening agents can be incorporated into the abrasive composition to increase its viscosity or otherwise alter its rheological characteristics.
  • suitable thickeners include carboxyvinyl resins (e.g., CARBOPOL, commercially available from Noveon Inc., Cleveland, Ohio), acrylics (e.g., ACUSOL, commercially available from Dow Chemical Company, Midland, Michigan, USA), clay (e.g., BENTONE, commercially available from Elementis Specialties Rheox, Highstown, New Jersey), and combinations thereof.
  • a stand-alone thickener can be added in effective amounts ranging from 0.2 percent to 5 percent by weight, or more particularly, ranging from 0.5 percent to 3 percent by weight, based on the overall weight of the composition.
  • Certain thickeners such as ACUSOL acrylics, arc known as associative thickeners. These thickeners operate by chemically interacting with an associated base chemical. Suitable base chemicals include monoethanolamine, diethanolamine, triethanolamine, morpholine, and combinations thereof. Base chemicals may be incorporated into the abrasive composition in effective amounts ranging from 0.05 percent by weight to 3 percent by weight, and more particularly ranging from 0.1 percent by weight to 1 percent by weight, based on the overall weight of the composition.
  • Particulate abrasives to be used in the present invention are generally comprised of hard minerals that act to remove material from the substrate to be abraded.
  • the grain size of such particles generally varies according to the application and the stage of polishing.
  • the particulate abrasives have an average particle diameter ranging from 0.5 micrometers to 50 micrometers.
  • the average particle diameter preferably ranges from 4 micrometers to 50 micrometers in a rough abrading step and then ranges from 0.5 to 4 micrometers in a finishing abrading step.
  • the hardness of an abrasive material used for the particulate abrasives ranges from 4 to 10 on the Mohs hardness scale.
  • the abrasives include (sintered) diatomaceous earth, tripoli, silica powder, alumina abrasives (e.g., sintered alumina abrasive, brown alumina abrasive, white alumina abrasive, pink alumina abrasive, mono-crystalline fused alumina abrasive), colloidal silica, synthetic silica, silicon carbide, and mixtures thereof.
  • alumina abrasives e.g., sintered alumina abrasive, brown alumina abrasive, white alumina abrasive, pink alumina abrasive, mono-crystalline fused alumina abrasive
  • colloidal silica e.g., sintered alumina abrasive, brown alumina abrasive, white alumina abrasive, pink alumina abrasive, mono-crystalline fused alumina abrasive
  • formulations disclosed herein may further include various other functional and/or aesthetic additives.
  • the provided abrasive composition may optionally include a preservative or anti-microbial chemical compound.
  • suitable preservatives include aqueous, non-metallic preservatives (e.g., NUOSEPT, commercially available from International Specialty Products, Wayne, New Jersey), microbicide preservatives (e.g., NUOCIDE, commercially available from International Specialty Products, Wayne, New Jersey), personal-care product preservatives (e.g., KATHON, commercially available from Dow Chemical Company, Midland, Michigan, USA), and combinations thereof.
  • the preservatives may be present in the abrasive composition in effective amounts of 0.05 percent to 0.5 percent by weight, and more particularly in effective amounts of 0.1 percent to 0.3 percent by weight, based on the overall weight of the composition.
  • the composition includes any of a variety of dyes or pigments for imparting a desirable color to the abrasive composition.
  • one or more additives may be included to provide a desirable fragrance to the composition if so desired.
  • the abrasive composition of the present invention is prepared by mixing the organic solvent, co-surfactant, and lubricant in a batch mixer at room temperature.
  • the water, particulate abrasives, nonionic surfactant, and any other optional additives can be then be added at low shear to produce a stable oil-in-water emulsion.
  • the shear rate can then be increased as the thickener is added in appropriate amounts to provide the desired viscosity of the finished abrasive composition.
  • the abrasive composition may be continuously mixed at high shear for several minutes at room temperature. While any of a number of high-shear mixers may be used to prepare these disclosed abrasive compositions, particularly suitable high-shear mixers include, for example, the Premier model mixer, commercially available from the Dispersator Company, Temple, Pennsylvania.
  • a typical finishing process for a gelcoat surface includes three basic steps. The first is a cleaning step that removes salt, dirt, grease, mold, and stains from the substrate surface to the finished. The second is a compounding and polishing step, which creates the smooth glossy surface to be protected. Depending on the condition of the surface, there could be several stages to this process. The third step is a waxing step. This step involves applying a thin polymer or wax coating onto the surface to seal and protect the polished gelcoat.
  • the provided abrasive compositions are especially useful in the aforementioned polishing step for removing defects on these surfaces.
  • the gelcoat is initially abraded using a coarse abrasive to remove the majority of the defects.
  • coarse abrasives have the tendency to leave scratch marks on the gelcoat surface.
  • the provided abrasive composition can then be applied and rubbed on the gelcoat surface with a buffing pad to remove the scratch marks.
  • the volatile components evaporate from the remaining abrasive composition.
  • Additional cycles of distributing the abrasive composition on the surface with buffing pads may then be carried out. Preferably, this occurs using a series of abrasive buffing pads with decreasing abrasiveness to provide a progressively finer cut on the gelcoat surface. It is not uncommon for several cycles, with a total working time of several minutes each, to be used to remove the scratch marks and provide a smooth surface upon completion. Additional application and buffing cycles may be used as appropriate for the particular application at hand.
  • the buffing pads used with the provided abrasive composition to polish the gelcoat surfaces may be applied by hand or using a power tool, such as dual action or orbital sander.
  • Abrasive-1 An ⁇ -aluminum oxide powder with average particle size 4-6 micrometers, obtained from Ferro Corporation, Mayfield Heights, Ohio, USA.
  • Abrasive-2 An ⁇ -aluminum oxide powder with average particle size 6-8 micrometers, from PIDC Company, Ann Arbor, Michigan, USA.
  • Acusol 820 A hydrophobically modified alkali soluble acrylic polymer emulsion, obtained under the trade designation "ACUSOL 820” from Dow Chemical Company, Midland, Michigan, USA.
  • Brij 23 A non-ionic polyoxyethylene ether with tricosaethylene glycol dodecyl ether as main component, obtained under the trade designation "BRIJ L23" from Sigma-Aldrich Company.
  • Exxsol D80 A dearomatized hydrocarbon fluid, obtained under the trade designation "EXXSOL D80" from ExxonMobil Chemical Company, Houston, Texas, USA.
  • Kathon CG A broad-spectrum biocide aqueous solution with 5-chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one as active ingredients, obtained under the trade designation "KATHON CG" from Dow Chemical Company.
  • NIS1 A block copolymer of approximately 2000 molecular weight with a polypropylene oxide core which represents 90% of the total molecular weight capped by ethylene oxide, obtained under the trade designation "PLURONIC L61” from BASF Company, Ludwigshafen, Germany or obtained under the trade designation "SYNPERONIC PE/L 61” from Croda International plc, Snaith, UK.
  • NIS2 A block copolymer of approximately 12,000 molecular weight with a polypropylene oxide core which represents 30% of the total molecular weight capped by ethylene oxide obtained under the trade designation "SYNPERONIC PE/F 127" from Croda International plc.
  • NIS3 A block copolymer of approximately 1,100 molecular weight with a polypropylene oxide core which represents 90% of the total molecular weight capped by ethylene oxide, obtained under the trade designation "SYNPERONIC PE/L 31" from Croda International plc.
  • NIS4 A block copolymer of approximately 2,900 molecular weight with a polypropylene oxide core which represents 60% of the total molecular weight capped by ethylene oxide obtained under the trade designation "PLURONIC L64" from BASF Company, Ludwigshafen, Germany.
  • NIS5 A block copolymer of approximately 1,850 molecular weight with a polypropylene oxide core which represents 70% of the total molecular weight capped by ethylene oxide, obtained under the trade designation "PLURONIC L43" from BASF Company.
  • NIS6 A tetrafunctional block copolymer of approximately 6,900 molecular weight consisting of an ethylene diamine core functionalized with polypropylene oxide which represents 90% of the total molecular weight capped by ethylene oxide, obtained under the trade designation "SYNPERONIC T/1301" from Croda International plc.
  • NIS7 A block copolymer of approximately 2,500 molecular weight with a polypropylene oxide core which represents 80% of the total molecular weight capped by ethylene oxide, obtained under the trade designation "PLURONIC L62" from BASF Company.
  • NIS8 A block copolymer of approximately 3,300 molecular weight with a polyethylene oxide core capped by polypropylene oxide which represents 90% of the total molecular weight, obtained under the trade designation "PLURONIC 31R1" from BASF Company.
  • NIS9 A block copolymer of approximately 3,800 molecular weight with a polypropylene oxide core which represents 90% of the total molecular weight capped by ethylene oxide, obtained under the trade designation "PLURONIC L101" from BASF Company, or obtained under the trade designation "SYNPERONIC PE/L 101" from Croda International plc.
  • NIS10 A block copolymer of approximately 2,700 molecular weight with a polyethylene oxide core capped by polypropylene oxide which represents 60% of the total molecular weight, obtained under the trade designation "PLURONIC 17R4" from BASF Company.
  • NIS11 A polypropylene glycol homopolymer of approximately 400 molecular weight obtained under the trade designation "PPG 400” from Sigma-Aldrich Company.
  • NIS12 A tetrafunctional block copolymer of approximately 3,600 molecular weight consisting of an ethylene diamine core functionalized with polypropylene oxide which represents 90% of the total molecular weight capped by ethylene oxide obtained under the trade designation "SYNPERONIC T/701" from Croda International plc.
  • NIS13 A block copolymer of approximately 2,200 molecular weight with a polyethylene oxide core capped by polypropylene oxide which represents 80% of the total molecular weight, obtained under the trade designation "PLURONIC 17R2" from BASF Company.
  • NIS14 A block copolymer of approximately 3,600 molecular weight with a polyethylene oxide core capped by polypropylene oxide which represents 60% of the total molecular weight, obtained under the trade designation "PLURONIC 25R4" from BASF Company.
  • Parol 70 A technical grade white mineral oil, obtained under the trade designation "PAROL 70" from Calumet Specialty Product Partners, LP, Indianapolis, Indiana, USA.
  • Tergitol 15-S-7 A secondary alcohol ethoxylate, nonionic surfactant, obtained under the trade designation "TERGITOL 15-S-7" from Dow Chemical Company.
  • Tomadol 1-5 A non-ionic surfactant made from linear C11 alcohol with 5 moles (average) of ethylene oxide, obtained under the trade designation "TOMADOL 1-5" from Air Products and Chemicals, Inc., Allentown, Pennsylvania, USA.
  • Tween 80 Polysorbate 80, a nonionic surfactant and emulsifier, obtained under the trade designation "TWEEN 80" from Sigma-Aldrich Company.
  • a 400 gram batch of a buffing compound was made as follows. 64 grams Exxsol D80, 20 grams Tween 80, and 12 grams Parol 70 were added into a mixer (Dispermat CV2-FHV, obtained from VMA-Getzmann, Reichshof, Germany) and mixed for 15 minutes at approximately 23 °C. Then, 2 grams triethanolamine, 222.6 grams water, and 8 grams glycerine were added into the mixer and mixed for 10-15 minutes at low shear. 60 grams Abrasive-1, 4 grams NISI, and 0.4 grams Kathon CG were then added and mixing continued until a homogeneous dispersion was formed (approximately 15 minutes). 7 grams Acusol 820 was slowly added to the dispersion while the shear rate was increased. Mixing was continued at high shear for another 30 minutes.
  • Example 1 The procedure generally described in Example 1 was repeated, wherein the 60 grams Abrasive-1 was replaced with 60 grams Abrasive-2.
  • Example 1 The procedure generally described in Example 1 was repeated, wherein the 20 grams Tween 80 was replaced with 20 grams Brij 23.
  • Example 1 The procedure generally described in Example 1 was repeated, wherein the 20 grams Tween 80 was replaced with 20 grams Tergitol 15-S-7.
  • Example 1 The procedure generally described in Example 1 was repeated, wherein the 20 grams Tween 80 was replaced with 20 grams Tomadol 1-5.
  • Example 1 The procedure generally described in Example 1 was repeated, wherein 2 grams of NISI and 224.6 grams of water were used.
  • Example 1 The procedure generally described in Example 1 was repeated, wherein 20 grams of NISI and 206.6 grams of water were used.
  • Example 2 The procedure generally described in Example 1 was repeated, wherein 4 grams NIS1 was replaced by 4 grams NIS2.
  • Example 1 The procedure generally described in Example 1 was repeated, wherein 4 grams NISI was replaced by 4 grams NIS3.
  • Example 1 The procedure generally described in Example 1 was repeated, wherein 4 grams NISI was replaced by 4 grams NIS4.
  • Example 1 The procedure generally described in Example 1 was repeated, wherein 4 grams NIS1 was replaced by 4 grams NIS5.
  • Example 1 The procedure generally described in Example 1 was repeated, wherein 4 grams NISI was replaced by 4 grams NIS6.
  • Example 1 The procedure generally described in Example 1 was repeated, wherein 4 grams NIS1 was replaced by 4 grams NIS7.
  • Example 1 The procedure generally described in Example 1 was repeated, wherein 4 grams NIS1 was replaced by 4 grams NIS8.
  • Example 1 The procedure generally described in Example 1 was repeated, wherein 4 grams NISI was replaced by 4 grams NIS9.
  • Example 1 The procedure generally described in Example 1 was repeated, wherein 4 grams NISI was replaced by 4 grams NIS10.
  • Example 1 The procedure generally described in Example 1 was repeated, wherein 4 grams NIS1 was replaced by 4 grams NIS11.
  • Example 2 The procedure generally described in Example 1 was repeated, wherein 4 grams NIS1 was replaced by 4 grams NIS12.
  • Example 1 The procedure generally described in Example 1 was repeated, wherein 4 grams NISI was replaced by 4 grams NIS13.
  • Example 1 The procedure generally described in Example 1 was repeated, wherein 4 grams NISI was replaced by 4 grams NIS14.
  • Example 1 The procedure generally described in Example 1 was repeated, wherein no NISI and 226.6 grams of water was used.
  • Gelcoat panels whose general construction mirrors what is found in certain segments of marine construction, can be described as follows. First, a layer of black or white gelcoat supplied by Ashland Inc., Covington, Kentucky, USA or HK Research Corporation, Hickory, North Carolina, USA, was laid down on a flat mold at an average thickness of 0.5 mm. Layers of fiberglass were applied over the gelcoat to a thickness of approximately 3 mm. A foam core, 9-12 mm in thickness, was applied to the fiberglass. A second layer of fiberglass, approximately 3 mm in thickness, followed by a gelcoat with a thickness of approximately 0.5 mm, was applied to this foam core. The construction was cured to the manufacturer's specifications to give a double-sided gelcoat panel of 16-19 mm in thickness. Panels for testing, 3 feet (0.91 meters) by 4 feet (1.22 meters), were cut from this larger master panel.
  • a 3 feet (0.91 meters) by 4 feet (1.22 meters) gelcoat panel was sanded with a 6 inch (15.24 centimeter) diameter P800 Finishing Film, obtained under trade designation "PURPLE FINISHING FILM HOOKIT DISC P800," using a dual action sander.
  • the panel oriented with the long axis horizontal, was sanded with one disc in overlapping, horizontal passes from top to bottom and bottom to top. The procedure was repeated using a second disc and again using a third disc.
  • the panel was divided vertically into thirds. To account for panel to panel variations in surface finish, one third of the each panel was buffed using either Example 1 or Comparative and a wool polishing pad (PN 5754) to serve as a control.
  • PN 5754 wool polishing pad
  • Example compounds The remaining two sections were buffed with one or two different Example compounds. Each area was buffed by using 9 grams of buffing compound for the first minute. For each subsequent minute of buffing, 6 grams of compound were added. Buffing continued until sand scratches were removed. The total time of buffing was recorded.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Paints Or Removers (AREA)
EP15816562.1A 2014-12-05 2015-11-24 Abrasive composition Active EP3227098B1 (en)

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US201462087884P 2014-12-05 2014-12-05
PCT/US2015/062261 WO2016089660A1 (en) 2014-12-05 2015-11-24 Abrasive composition

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EP3227098A1 EP3227098A1 (en) 2017-10-11
EP3227098B1 true EP3227098B1 (en) 2022-06-15

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EP3227098A1 (en) 2017-10-11
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